In case you have a reference string, JabRef offers the functionality to convert the text to BibTeX (or biblatex). For this, JabRef uses the technology offered by Grobid.
Example:
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O. Kopp, A. Armbruster, und O. Zimmermann, "Markdown Architectural Decision Records: Format and Tool Support", in 10th ZEUS Workshop, 2018.
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Click Library and select "New entry from plain text..." Alternatively, you can press Ctrl+Shift+N.